<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格嵌套</title>
</head>
<body>

<table border="1" width="100%" height="500px">

    <tr>
        <td width="30%">1-1</td>
        <td>1-2</td>
    </tr>
    <tr>
        <td colspan="2">
            <table width="100%" border="1" height="100%">

                <tr>
                    <td>inner-1</td>
                    <td>inner-2</td>

                </tr>
            </table>

        </td>

    </tr>
</table>

</body>
</html>